Valve-mechanism.



UNrrnn Sterns OLE SIVENSON, SR.,

hermit @reina OF CRESCO, IOXVA.

verve aient-mutsen@ SPECXFICATIDN forming part of Letters Patent No. 710,905, dated October '7, 1902.

Application tiled September 20, 1901. Serial No. 75,682. (No model.)

To @ZZ whom t may concern;

Be it known that I, OLE SWENSON, Sr., a citizen of the United States, and a resident of Cresce, in the county of Howard and State of Iowa, have invented a certain new and usel'ul Valve Mechanism, of which the following is a full, clear, and exact description.

My invention seeks to provide a means whereby grit may be removed from a valveseat and the valve reground without the necessity of removing the valve from its mounting; and to this end I provide the valve with two stems, one of which is hollow and which serves to raise and lower the valve from its seat and the other of which serves to rotatev the valve and grind its surface on the seat.

The in vention consists of novel features and parts and combinations et the same, as will be fully described hereinafter and then pointed out in the claim.

A practical embodiment of the invention is represented in the accompanying drawing, in which the igure represents a partial longitudinal section of my valve mechanism.

Wvithin the pipe l a valve-seat 2 is formed which is adapted to receive a valve 3. Said valve is adapted to be raised and lowered by a hollow valve-stem 4, which is independent ot' the Valve 3 and which is screw-threaded in a stufting-box 5. vSaid hollow stem 4 is operated by the usual hand-wheel 6. The handwheel (j is formed with a slot 6a in its hub, said slot receiving a pin 6b, projecting from the hollow valve-stein l, by reason of which construction the hand-wheel and the stem are simultaneously rotated. Rigidly connected or formed with the valve 3 is a solid auxiliary stem 7, passing through the hollow stem -l and through a packing S, held in a recess in the center of the hand-wheel 6. The valve-stern 7 is turned by means of the hand-wheel 9 bearing on the packing S. A pin l0 projects laterally from the stem 7 into a slot or recess ll of the hub of the hand-wheel 9, the pin serving to impart the rotary movement of the hand-wheel 9 to the stem 7. The outer end of the stem 7 is threaded to receive a nut or thumb-screw l2, by means of which the packing 8 can be adjusted.A

When it is desired to seat or unseat the valve, the hand-wheel G is turned to screw the hollow stem l inwardly, thereby carrying the valve 3 to its seat 2. In unseating the valve the hand-wheel 6 isturned in the opposite direction, thereby screwing the stem 4 outward away from the valve-seat. Then the handwheel 6 engages the hand-wheel 9, a further rotation of the hand-wheel G will unseat the valve. Should grit settle on the valve-seat, the valve is slightly loosened by means of the hand-wheel 6, whereupon the hand-wheel 9 is turned to grind the valve on its seat until all grit is removed, the stem 7 serving to turn the valve with'the hand-wheel 9.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl The combination substantially as described of the hollow stem provided at its outer end with a hand-wheel and concentrically with said hand-wheel with a recess and with packing therein, the valve-stem extending within said hollow stem and beyond the outer end thereof and threaded to receive the nut l2, the nut l2 on the said stem, the hand-wheel on said valve-stem between the nut l2 and the packing and provided on its inner side with a tubular extension bearing at its eX- tremity against the packing and provided internally with a' longitudinal groove, a pin on the valve-stem entering said groove, the handwheel of the stem being arranged for adjustment longitudinally along the stem and along the pin projecting therefrom by the operation of the nut l2 in adjusting the packing substantially as set forth.

In witness whereof l have signed my name to this specification in the presence of two subscribing witnesses.

OLE SIVENSON, SR.

Witnesses:

E. H. SHUTTLEWORTH, H. W. SHUTTLEWORTH. 

